<!--region 封装的分页 table-->
<template>
  <div class="table">
    <el-table id="iTable" v-loading.iTable="loading" :data="list" :max-height="height" border
              :stripe="options.stripe" ref="mutipleTable" @selection-change="handleSelectionChange">
      <!--region 选择框-->
      <el-table-column v-if="options.mutiSelect" type="selection" style="width: 55px;">
      </el-table-column>
      <!--endregion-->
      <!--region 数据列-->
      <template v-for="(column, index) in columns">
        <el-table-column :key="index" :prop="column.prop" :label="column.label" :align="column.align"
                         :width="column.width"
                         :class-name="column.className">
          <template slot-scope="scope">
            <template v-if="!column.render">
              <template v-if="column.formatter">
                <span v-html="column.formatter(scope.row, column)"></span>
              </template>
              <template v-else>
                <span>{{scope.row[column.prop]}}</span>
              </template>
            </template>
            <template v-else>
              <expand-dom :column="column" :row="scope.row"></expand-dom>
            </template>
          </template>
        </el-table-column>
      </template>
      <!--endregion-->
      <!--region 按钮操作组-->
      <el-table-column ref="fixedColumn" label="操作" align="center" :width="operates.width" :fixed="operates.fixed"
                       v-if="operates.list.filter(_x=>_x.show === true).length > 0">
        <template slot-scope="scope">
          <div class="operate-group">
            <template v-for="(btn, key) in operates.list">
              <div class="item" :key="key" v-if="btn.show">
                <el-button :type="btn.type" size="mini" :icon="btn.icon" :disabled="btn.disabled" :plain="btn.plain"
                           @click.native.prevent="btn.method(key,scope.row)">{{ btn.label }}
                </el-button>
              </div>
            </template>
          </div>
        </template>
      </el-table-column>
      <!--endregion-->
    </el-table>
    <div style="height:12px"></div>
    <!--region 分页-->
    <el-pagination v-if="pagination&&!options.loading" @size-change="handleSizeChange"
                   @current-change="handleIndexChange"
                   :page-size="tableCurrentPagination.pageSize" :page-sizes="this.tableCurrentPagination.pageArray"
                   :current-page="tableCurrentPagination.pageIndex" layout="total,sizes, prev, pager, next,jumper"
                   :total="total"></el-pagination>
    <!--endregion-->
  </div>
</template>
<!--endregion-->
<script>
const _pageArray = [20, 50, 100] // 每页展示条数的控制集合
export default {
  props: {
    list: {
      type: Array // prop:表头绑定的地段，label：表头名称，align：每列数据展示形式（left, center, right），width:列宽
    }, // 数据列表
    columns: {
      type: Array // 需要展示的列 === prop：列数据对应的属性，label：列名，align：对齐方式，width：列宽，className: 当前列的class
    },
    operates: {
      type: Object // width:按钮列宽，fixed：是否固定（left,right）,按钮集合 === label: 文本，type :类型（primary / success / warning / danger / info / text），show：是否显示，icon：按钮图标，plain：是否朴素按钮，disabled：是否禁用，method：回调方法
    },
    total: {
      type: Number,
      default: 0
    }, // 总数
    pagination: {
      type: Object,
      default: null // 分页参数 === pageSize:每页展示的条数，pageIndex:当前页，pageArray: 每页展示条数的控制集合，默认 _page_array
    },
    loading: Boolean,
    otherHeight: {
      type: Number,
      default: 160
    }, // 计算表格的高度
    options: {
      type: Object,
      default () {
        return {
          stripe: false, // 是否为斑马纹 table
          highlightCurrentRow: false, // 是否支持当前行高亮显示
          mutiSelect: false // 是否支持列表项选中功能
        }
      }
    } // table 表格的控制参数
  },
  components: {
    expandDom: {
      props: {
        column: {
          required: true
        },
        row: {
          required: true
        }
      },
      render (h) {
        return h('div', {}, ([this.column.render(this.row, this.column)]))
      }
    }
  },
  data () {
    return {
      pageIndex: 1,
      tableCurrentPagination: {},
      multipleSelection: [] // 多行选中
    }
  },
  created () { },
  mounted () {
    if (this.pagination && !this.pagination.pageSizes) {
      this.pagination.pageArray = _pageArray // 每页展示条数控制
    }
    this.tableCurrentPagination = this.pagination || {
      pageSize: this.total,
      pageIndex: 1
    } // 判断是否需要分页
  },
  computed: {
    // 计算table高度
    height () {
      return this.$utils.Common.getWidthHeight().height - this.otherHeight
    }
  },
  methods: {
    // 切换每页显示的数量
    handleSizeChange (size) {
      if (this.pagination) {
        this.tableCurrentPagination = {
          pageIndex: 1,
          pageSize: size
        }
        this.$emit('handleSizeChange', this.tableCurrentPagination)
      }
    },
    // 切换页码
    handleIndexChange (currnet) {
      if (this.pagination) {
        this.tableCurrentPagination.pageIndex = currnet
        this.$emit('handleIndexChange', this.tableCurrentPagination)
      }
    },
    // 多行选中
    handleSelectionChange (val) {
      this.multipleSelection = val
      this.$emit('handleSelectionChange', val)
    },
    // 显示 筛选弹窗
    showfilterDataDialog () {
      this.$emit('handleFilter')
    },
    // 显示 表格操作弹窗
    showActionTableDialog () {
      this.$emit('handelAction')
    }
  }
}
</script>

<style lang="scss">
.table {
  height: 100%;
  width: calc(#{"100% - 20px"});
  margin: 0 auto;
  .el-pagination {
    float: right;
    margin: 20px;
  }
  .el-table__header-wrapper,
  .el-table__fixed-header-wrapper {
    thead {
      tr {
        th {
          color: #333333;
        }
      }
    }
  }
  .el-table-column--selection .cell {
    padding: 0;
    text-align: center;
  }
  .el-table__fixed-right {
    bottom: 0 !important;
    right: 6px !important;
    z-index: 1004;
  }
  .operate-group {
    display: flex;
    flex-wrap: wrap;
    .item {
      margin-top: 4px;
      margin-bottom: 4px;
      display: block;
      flex: 0 0 50%;
    }
  }
  .filter-data {
    top: calc(#{"(100% - 100px) / 3"});
    background-color: rgba(0, 0, 0, 0.7);
  }
  .table-action {
    top: calc(#{"(100% - 100px) / 2"});
    background-color: rgba(0, 0, 0, 0.7);
  }
  .fix-right {
    position: absolute;
    right: 0;
    height: 100px;
    color: #ffffff;
    width: 30px;
    display: block;
    z-index: 1005;
    writing-mode: vertical-rl;
    text-align: center;
    line-height: 28px;
    border-bottom-left-radius: 6px;
    border-top-left-radius: 6px;
    cursor: pointer;
  }
  .el-table--medium {
    td {
      padding: 2px !important;
    }
  }
}
</style>
